leachate evaporation at a large landfill in the southeast ... · 205-acre permitted landfill...

A World of Solutions

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Leachate Evaporation at a Large Landfill in the Southeast:

Challenges and Solutions

Robert JohnstonBusiness Development ManagerLFG Specialties (a CB&I company)

A World of Solutions 1

• #1 Operational cost• Special waste impacts• Increased / stored volume due to

recirculation/Bioreactor– Higher concentrations of constituents

• Truck and off-site Disposal (T&D)– Increased risk by hauling off-site– Uncertainty in long term costs

• POTW / Municipal WWTP– At or near capacity– Stringent constituent limits– UV treatment– Uncertainty in long term commitment and cost

Challenges of Leachate Management-Industry Wide Concerns

2A World of Solutions

●Three generations of patented technology:– 1992: Original design

• Evaporator with enclosed flare• ~2,400 scfm for 30,000 gpd• 14 installations

– 2004: Direct discharge design• Improved combustion efficiency• Direct discharge of vapor plume• ~500 scfm for 30,000 gpd• 7 installations

– 2015: Waste heat design• Utilization of waste heat• Currently under development

Evaporator Overview

E-Vap® Experience

Domestic Sites GPD

Hunt Road MA 1997 10,000

Olympic View WA 2000 20,000

Okeechobee FL 1998 20,000

Liberty IN 1998 10,000

Earthmovers IN 1998 10,000

Southern Allegheny PA 1999 13,000

Okeechobee FL 2003 20,000

Sauk Trail MI 1999 20,000

Forest Lawn MI 1999 20,000

Greenridge PA 1999 30,000

Cherokee OH 1998 10,000

Brunner PA 2004 20,000

Waters MI 2007 30,000

Northern Oaks MI 2008 30,000

Glens MI 2009 30,000

Sampson County NC 2011 30,000

Forest Lawn MI 2012 30,000

International Sites GPD

Redvale, New Zealand 1999 20,000

Sao Paulo, Brazil 2001 5,000

Beijing, China 2004 10,000

Caracas, Venezuela 2005 30,000


Evaporator Overview


● Sampson County Disposal, LLC

● 205-acre permitted landfill boundary

● 55 million cubic yards of permitted airspace

● Began operations early 2000

● Purchased by Waste Industries in May 2000

● Leachate recirculation approved by State in 2003

● 10.5 million tons waste in place as of 2012

Sampson County Landfill, NC – Case Study


● Leachate recirculation was practiced long term with no volume reduction which resulted in operational issues.

● Site was prepared to install a pipeline to the local POTW, however, they were unable to commit to the desired disposal volume (i.e. >30,000 gpd). This option also included onsite pre-treatment.

● T&D to other sites was impractical due to volume and distance

Sampson County Landfill, NC – Leachate Management Specific Challenges


● Arranged meeting with NC DENR to discuss project.● Estimated emissions of criteria pollutants and HAPs/toxics

– NMOC < 20 PPMV, as hexane, or > 98% destruction– CO < 0.30 lbs/MMBTU fired– NOx < 0.05 lbs/MMBTU fired– Particulate < 20 tons per year

● Modeled ambient air impacts at the property boundary for:– chromium, – arsenic, and – ammonia.

● Source was demonstrated to be in compliance and was then permitted as a “minor source” under the control of CB&I.● Air Permit was issued within 60 days.● Leachate recirculation permit—TCLP performed on residuals● Building Permit

Permitting


● Air Permit Issued December 20, 2011● Equipment Delivery 6 Months● Site Construction 3 months● Start-up and commissioning 1 month● Commercial Operation Date September 15, 2012● 10 months start to finish

Project Schedule


Site Excavation


Setting the Equipment


Installation complete, no building


Facility in Operation


● System Production– September 15, 2012 through August 31, 2016 (1446 days/4 years)

• Processed 32,570 gpd of leachate• Discharged 3,192 gpd of residual (9.8%)• Evaporated 29,378 gpd of leachate

– 95.2% on line time since start up● Residual Management

– Total solids in influent range from 1-3%, typically 1%– Daily samples taken in E-Vap vessel– Managed to <8% total solids by increasing blow down– Site utilizes a 3,300 gallon water truck to transport leachate– 7 tankers per week

● Anti-foaming agent added in evaporator vessel to keep from foaming.

E-Vap® Operations


Leachate Management Service Agreement

● 10 year term, with renewal options– Annual service fee and escalator– Ground Lease

● CB&I provides– Complete E-Vap® system and building– Facility operator, including on-call coverage– All consumables & materials– 10 year warranty on all repairs and maintenance– Guaranteed operating capacity (annual basis)

● Waste Industries provides– Leachate storage– Utilities (power and landfill gas)– Residual management

● Total cost of operations including power and residual management is $0.055 to $0.065 per gallon which resulted in a 20-25% cost savings.


Contact:Robert [email protected]

Questions?

leachate evaporation at a large landfill in the southeast ... · 205-acre permitted landfill...

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